gardiner



TO ALL WHOM IT MAY CONCEBN: t Be it known thatl, J. B. Gewinns, ciSpringfield, county of Hampdcn, S tato of Massachusetts, have-- inventedcertain new and .useful Improvements in'Steam-Pum'ps, ot` wl1ich.thfollovving is a full and exact description, reference being had to theaccompanying drawings, and tothe letters of reference marked thereon.

J. n. GARDINER or srinneriniin, MASSAGHUsETTs.

Letters Patent No. 74,075, dated Februari] 41,1868.v Y A VIhreOVBMBNT InSTEAM-PUMPS.

In the drawings accompanying this description Figure lrcpresents avertical section through 4the'steam-chest, steam-cylindex-,andshutting-box;

Figure 2 is a' vertical section, showing the arrangement of the-.valvesand Figure 3 is another view of thevalves.

This invention, so fa'r as the movement of the steam-piston isconcerned, is of rthat class of engine commonly applied todirect-action'steam-pumps, in which the main slide-valve isoperatedb'y-meansof a secondary piston, t which is Ain Vturn operated bysteam leten in some positive manner bythe steam-piston, for the purpose of 4reversing the motion of the latter by the movement of the slide-valvo.vi i This motive-piston muy be independent from the valve operated by thesteam-pston for tbepnrpose inentioned, namely, letting on o f thestenmto the motive-piston, as shown in thepatent to Gardiner SDVHyde,dated December 17, 1867, or it may be combined `into and `with it,.as inthis case. i Y

'My improvements are, first, a new and improved method of moving the'motive-valve;v second, an improved arrangement of the valve, Vinconnectionwith its rodand lthe stegmfylindernnd,piston; third,an'impro'ved construction oi the valve-chest; fourth, an improved, formof st-uing-box.

In addition to' theordinary letting on of steam to the end of themotive-pistonforthe purpose if movingit', and, consequently, theslide-valve, I also simultaneously with thisletting on,i r just previousthereto, place the valve in ancha position that' the steam upon theopposite end of the motive-piston shall exhaust, and leave the valvefree to'inove, thus rendering the motion of the-valve more positive;

l, I n order to shovr the manner of accomplishing this and my otherimprovements, will now describe the construction and operation of theinvention. i

A is the steampiston B, the plunger of a single-acting, or thepiston-'rod of a doubleLacting pump; C is the valve-rod, connecteddirectly to the'ce'ntre of the piston, and passing through'into'theinteror'of the c om- #bined secondaryvalve and motive-piston D. Thisvalve-rod C has 'aA head, E, formed on it, for the purpose of moving thesecondary valve, as hereafter described. F is the rnnin slide-valve',operated by the compound motion' of the piston-valve D. t

The operation of the steamfports is as follows: We will suppose thosteam-piston in theposition shown in v the drawing. Steam'is being leton at the top of the piston through the port a, and exhausted from blorthrough the port bi When the piston arrives near enough to the end ofits stroke, the valveD isr moved by the .operatio'n ofthe projection v,on the head oi' the valve-rod, operating in the slot d in the valve, insucha manner sa to bring theexhaust-ports Ag gon the end of the valve,in line with ca eh other perpendicnlarly; and the ports h h', ox theopposite end, also in s. similar manner in lino with each other.` Thereis, however, no communcationi between thestearn-chamber II and the upperenilof tho valve, `nor between the exhaustwbmbei J and its lower end,nntiltlteffurtlxcr downivard motion of the piston -carries them oppositeleach-other horizontally', .when steam is lot on to the upper end and loil'frorn tho lower, thus moving the valve D, and with it the slide-'-valve F, thus reversing the movement ofztlie vmain piston; This movementis repeated nt either end of the steamoylinder,'thus causing a'continuous reciprocating motion of the same. l

The other improvements in the construction of the ,pump ne,`th earrangement of the fsteam-ehest and steam-cylinder one above the other,and of the same piece, as sliovn, thus saving much labor, and avoiding ajoint which 'is apt Vto leak, and also thc arrangement of the valve,valve-rod, and steam'fpiston, in such` a manner *that they operatecentrally tvith cach other, thus saving much friction, and avoidingcillcomplication attendant on outside and eccentric valve-rods andtappets; `also the nrrangemcnt of the steamrnhamber II upon one side,

and the exliaust-hamhcrJ upon the other, renders the formation of theports `comnnrnicatingtherewith more direct, and enables mc toregnlatethc movement ofthe valve -hy allowing more or less st oam topass from the steam-chanibcr 'to onecnd, and from the ther en d to -thcexhaust-chamber,'hymeansof the adjustingclowlV 'o o', 4as shown. 4 t

My improved stufng-box consists of followers, P :PQ Whichenterthecnds of the steam a'nd watex cy`l inders,' vund press upon the packing in therecesses I I These follovvers have screw-threds cut upon them, on which,

the double nut S fits. This nut has a. right-hand thread out in one end,and a ie'ft-hand thread cut inthe-other;

nd as it is turned in one direction, the followers are forcedin upon thopecking, und as it is turned in the other,

theyare drawn out away fro-mthe-same.

The Stettin-piston is shown in the drawings attached to lthe plunger ofa singlenctinguptimp, shown in the patent to Gardiner & Hyde, December17, 1867, thus forming. a. very Simp-le central direcbactingpump. f

The ndventuges of the construction of a steam-pump, as awhole, are,simplicity, co'mpxictness, end conse-f q -vent cheapness ofconstruction, and'duiability.. Y

And now, having described my invention, what I 'claim as new, vunddesire to secnre by fretten# Patent, is +-A 1. The arrangementmf ports'gy. on each end of the valve, and comunnilnting with thevexhnust, forthe purpose ofassisting inthe movement ofthe valve, As*nbr'stantizii-lj'as.set forth;

2. The .arrangement of the steam-chmnbcrl-11 n .nd exhaust-chamber Jupon the two sides ofthe steztm-chest,

substantiallyvas set forth.

3. The arrzingement of the screws o o, wh er= vvthv to adjust the vumoimt of steani let on and-'ofi' the valve, ma

described.'

4. Thestng-bok, ,constructed of lthe followers P P and nut S, inzonrbifmti on r'with the-piston A/und plunger B,zsub sta.ntiaily asdescribed. i Y

' 5. In combination with the centrl-acting-valve, vaivc-rodmd-steemgpisto'n, arrangc and operating nel

